[libcamera-devel] libcamera on pinephone

[Eric Curtin]

On Tue, 21 Jun 2022 at 22:57, Pavel Machek via libcamera-devel
<libcamera-devel at lists.libcamera.org> wrote:
>
> Hi!
>
> > > Could you print the length of all planes and see how they look like in
> > > memory ? Also note that the two planes have the same fd so they
> > > seem to be contiguous in memory if I'm not mistaken ?
>
> That may be above my skill level (sorry).
>
> > We really need data offset support for V4L2 buffer planes in the V4L2
> > API :-S See http://lore.kernel.org/linux-media/20200804192939.2251988-3-helen.koike@collabora.com/
> >
>
> But I understood enough to realize that I420 is problematic, switched
> to 1280x720-BA810x31384142 and now I have... something ;-).
>
> I do have some captured files. It does _not_ end in success. I'd like
> to see what I'm getting, and I guess viewfinder would be useful.
>
> Dependency SDL2 found: YES 2.0.22 (cached)
> Dependency SDL2_image found: YES 2.0.5 (cached)
> Run-time dependency qt5 (modules: Core, Gui, Widgets) found: NO (tried pkgconfig)
>
> README.rst does not mention sdl. I believe it should?

I can add this, SDL support was very recently added.

>
> for cam: [optional]
>         libevent-dev
>
> mobian at mobian:~/g/libcamera$ LIBCAMERA_LOG_FILE=/tmp/camera.log LIBCAMERA_LOG_LEVELS=*:DEBUG build/src/cam/c\
> am -c 1 -I --capture=50  -S
> Using camera /base/i2c-csi/rear-camera at 4c as cam0
> 0: 1280x720-SBGGR8
>  * Pixelformat: SBGGR8 (1280x720)-(1280x720)/(+1,+1)
>   - 1280x720
> Unsupported pixel format SBGGR8
> Failed to configure frame sink
> Failed to start camera session
> mobian at mobian:~/g/libcamera$
>
> Hmm. Is SDL not able to display SBGGR8? Is there anything else I can
> try before trying to play with gstreamer?

SDL sink at present only supports YUYV and MJPEG, because they are the
only cameras I physically have and can test with.

ls src/cam/sdl_texture*

It would be cool to add more display/capture pixel format combinations alright.


>
> Thanks and best regards,
>                                                         Pavel
> --
> People of Russia, stop Putin before his war on Ukraine escalates.